package com.atguigu.springcloud.service;


import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    /**
     * 正常访问
     *
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "   paymentInfo_OK,id：" + id + "\t" + "O(∩_∩)O哈哈~";
    }

    /**
     * http://localhost:8001/payment/hystrix/timeout/31
     *
     * @param id
     * @return
     * @HystrixCommand报异常后如何处理： 一旦调用服务方法失败并抛出了错误信息后，
     * 会自动调用@HystrixCommand标注好的fallbackMethod调用类中的指定方法
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler", commandProperties = {
            //设置这个线程的超时时间是3s，3s内是正常的业务逻辑，超过3s调用fallbackMethod指定的方法进行处理
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "3000")
    })
    public String paymentInfo_Timeout(Integer id) {
        int timeNumber = 5;
        int age = 10 / 0;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" + Thread.currentThread().getName() + "   paymentInfo_Timeout,id：" + id + "\t" + "O(∩_∩)O哈哈~" +
                "   耗时(秒)：" + timeNumber;
    }

    public String paymentInfo_TimeOutHandler(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "   系统繁忙或者运行报错，请稍后再试,id：" + id + "\t" + "o(╥﹏╥)o";
    }

    /**
     * 服务熔断
     */
    @HystrixCommand(fallbackMethod = "paymnetCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"), // 是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"), // 请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), // 时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60") // 失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("******id 不能为负数");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" + "调用流水号：" + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能是负数，请稍后再试，o(╥﹏╥)o id ：" + id;
    }
}


